If you’re new to social media, you might not yet have encountered the hashtag, which provides a way to categorize tweets. Although hashtags have been used mainly on Twitter, they have now spread to other platforms, such as Instagram and Pinterest. They’re sort of like a digital bookmark.

For example, if you want to group tweets about cooking, you might use #recipes, whenever you tweet about a recipe you’re sharing.

Hashtags can be a great tool when you want to join conversations, organize tweets and promote your company. They’re also a great way to get your brand and content in front of new eyeballs, because many Twitter users regularly save and visit certain hashtags.

So, which hashtags should you follow? Forget the trial and error, and try out these small-business gems.

This hashtag is very meta, because it uses social media to talk about social media. But it’s worth following if you’re new and trying to figure things out. You’ll find insights, advice and resources for navigating the Wild, Wild, West of the social media world.

Follow this hashtag for “Small Business Saturday,” an American shopping holiday created by American Express that encourages shoppers to patronize local brick-and-mortar businesses. Small Business Saturday is held on the Saturday after Thanksgiving.